Implement backup and restore of LMEM during suspend / resume. What complicates things a bit is handling of pinned LMEM memory during suspend and the fact that we might be dealing with unmappable LMEM in the future, which makes us want to restrict the number of pinned objects that need memcpy resume.
The first two patches are prereq patches implementing object content copy and a generic means of iterating through all objects in a region. The third patch adds the backup / recover / restore functions and the two last patches deal with restricting the number of objects we need to use memcpy for.
Thomas Hellström (6): drm/i915/ttm: Implement a function to copy the contents of two TTM-base objects drm/i915/gem: Implement a function to process all gem objects of a region drm/i915 Implement LMEM backup and restore for suspend / resume drm/i915/gt: Register the migrate contexts with their engines drm/i915: Don't back up pinned LMEM context images and rings during suspend drm/i915: Reduce the number of objects subject to memcpy recover
drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/gem/i915_gem_context.c | 4 +- .../gpu/drm/i915/gem/i915_gem_object_types.h | 21 +- drivers/gpu/drm/i915/gem/i915_gem_pm.c | 46 ++++ drivers/gpu/drm/i915/gem/i915_gem_pm.h | 1 + drivers/gpu/drm/i915/gem/i915_gem_region.c | 70 ++++++ drivers/gpu/drm/i915/gem/i915_gem_region.h | 33 +++ drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 87 +++++++- drivers/gpu/drm/i915/gem/i915_gem_ttm.h | 8 + drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c | 199 ++++++++++++++++++ drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.h | 23 ++ .../gpu/drm/i915/gem/selftests/huge_pages.c | 2 +- drivers/gpu/drm/i915/gt/gen6_ppgtt.c | 2 +- drivers/gpu/drm/i915/gt/gen8_ppgtt.c | 5 +- drivers/gpu/drm/i915/gt/gen8_ppgtt.h | 4 +- drivers/gpu/drm/i915/gt/intel_context_types.h | 8 + drivers/gpu/drm/i915/gt/intel_engine_cs.c | 4 + drivers/gpu/drm/i915/gt/intel_engine_pm.c | 23 ++ drivers/gpu/drm/i915/gt/intel_engine_pm.h | 2 + drivers/gpu/drm/i915/gt/intel_engine_types.h | 7 + drivers/gpu/drm/i915/gt/intel_ggtt.c | 2 +- drivers/gpu/drm/i915/gt/intel_gt.c | 2 +- drivers/gpu/drm/i915/gt/intel_gt_pm.c | 3 + drivers/gpu/drm/i915/gt/intel_gtt.c | 3 +- drivers/gpu/drm/i915/gt/intel_gtt.h | 9 +- drivers/gpu/drm/i915/gt/intel_lrc.c | 3 +- drivers/gpu/drm/i915/gt/intel_migrate.c | 2 +- drivers/gpu/drm/i915/gt/intel_ppgtt.c | 13 +- drivers/gpu/drm/i915/gt/intel_ring.c | 3 +- drivers/gpu/drm/i915/gt/mock_engine.c | 1 + drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 2 +- .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 10 +- drivers/gpu/drm/i915/gvt/scheduler.c | 2 +- drivers/gpu/drm/i915/i915_drv.c | 4 +- drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 4 +- 35 files changed, 566 insertions(+), 47 deletions(-) create mode 100644 drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c create mode 100644 drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.h